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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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Untreated Gemstones Treatment

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1.95ct Green Peridot, Cushion, VS

1.95ct Green Peridot, Cushion, VS

8.3 x 6.3 mm

$ 76.48

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6.22ct Violet Amethyst, Pear Shape, VVS-VS

6.22ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 47.70

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2.12ct Violet Amethyst, Trillion, VVS-VS

2.12ct Violet Amethyst, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.61

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7.06ct Yellow Apatite, Oval, VS
Apatite Product Video (385925)

7.06ct Yellow Apatite, Oval, VS

14.7 x 11.7 mm

$ 372.82

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1.69ct Yellow Citrine, Round, VVS

1.69ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 11.79

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45.97ct Brown Jasper, Cushion, Opaque

45.97ct Brown Jasper, Cushion, Opaque

25.4 x 25.3 mm

$ 36.64

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0.24ct Brown Diamond, Round, VS
Diamond Product Video (564618)

0.24ct Brown Diamond, Round, VS

4 mm (calibrated)

$ 365.12

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2.27ct Multicolor Spectrolite, Oval, Opaque

2.27ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 10.70

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1.39ct Green Sphene, Oval, Transparent

1.39ct Green Sphene, Oval, Transparent

6.3 x 5.9 mm

$ 6.92

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81.64ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

81.64ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.3 mm

$ 178.89

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2.03ct Orange Zircon, Oval, VVS-VS

2.03ct Orange Zircon, Oval, VVS-VS

7.6 x 5.9 mm

$ 55.61

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19.45ctw Multicolor Labradorite, Pear Shape, Translucent

19.45ctw Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 43.01

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2.08ctw Green Demantoid Garnet, Oval, VS

2.08ctw Green Demantoid Garnet, Oval, VS

4 x 3 mm (calibrated)

$ 153.32

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 15.94

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2.73ctw Purple Rhodolite Garnet, Oval, VS

2.73ctw Purple Rhodolite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 44.41

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3.98ctw Red Pyrope Garnet, Square, VS

3.98ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.53

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1.36ct Green Peridot, Oval, VS

1.36ct Green Peridot, Oval, VS

7.4 x 5.8 mm

$ 14.90

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2.98ct Pink Strawberry Quartz, Oval, Transparent

2.98ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 22.35

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9.06ctw Brown Tiger'S Eye, Oval, Opaque

9.06ctw Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 11.91

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1.07ct Violet Amethyst, Marquise, VS

1.07ct Violet Amethyst, Marquise, VS

10 x 5 mm (calibrated)

$ 7.10

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1.15ct Green Sphene, Oval, SI
Sphene Product Video (391229)

1.15ct Green Sphene, Oval, SI

7.6 x 5.3 mm

$ 56.71

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0.59ct Red Pyrope Garnet, Heart, VVS-VS

0.59ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 14.69

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12.43ct Multicolor Bloodstone, Marquise, Opaque

12.43ct Multicolor Bloodstone, Marquise, Opaque

20.9 x 9.7 mm

$ 24.76

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35.89ct Brown Tiger'S Eye, Pear Shape, Opaque

35.89ct Brown Tiger'S Eye, Pear Shape, Opaque

32.1 x 23 mm

$ 31.46

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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